Pulse electrodeposition of hydroxyapatite/chitosan coatings on titanium substrate for dental implant
| Autor: | Seok-Jae Kim, Moon-Jin Hwang, Ho-Jun Song, Kyung-Hee Park, Yeong-Joon Park |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Polymers and Plastics Composite number chemistry.chemical_element 02 engineering and technology engineering.material 010402 general chemistry Electrochemistry 01 natural sciences Corrosion Chitosan chemistry.chemical_compound Colloid and Surface Chemistry Coating Materials Chemistry Brushite Physical and Theoretical Chemistry Metallurgy 021001 nanoscience & nanotechnology Phosphate 0104 chemical sciences chemistry engineering 0210 nano-technology Nuclear chemistry Titanium |
| Zdroj: | Colloid and Polymer Science. 295:1843-1849 |
| ISSN: | 1435-1536 0303-402X |
| DOI: | 10.1007/s00396-017-4166-x |
| Popis: | In this work, calcium phosphate/chitosan coatings were produced by the pulse electrodeposition method with variation of the deposition cycle and contents of chitosan solution. To investigate the morphology of the crystals and the electrochemical properties of hydroxyapatite/chitosan coating, a uniform hydroxyapatite coating was applied on the Ti-6Al-4 V substrate using the pulse voltage electrodeposition method. The coating formed in the as-deposited condition was identified as dicalcium phosphate dihydrate (DCPD) (brushite), which was converted to hydroxyapatite (HA, Ca10(PO4)6(OH)2) after immersion in 1 M NaOH at 80 °C for 2 h. The XRD patterns confirmed the formation of DCPD and HA. During electrodeposition, the H2PO4 − ion was reduced and the reaction between Ca2+ ions and the reduced phosphate ions induced the formation of DCPD, which was converted to HA following treatment in NaOH. The coatings were composed of 5 to 20% chitosan by volume. Homogeneous nano-size deposits were formed under the controlled deposition period of 15 cycles and chitosan content of 15 v%. The composite coatings showed significant improvement in corrosion resistance compared to the bare Ti-6Al-4 V substrate. |
| Databáze: | OpenAIRE |
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